well i have 13 neices and nephews and over the past 9 years they have gone through their teens, one thing i realised is that anything they ask for will be lost or forgotten about in no time. or worst still stolen???? not to mention the damage an ipod
touch etc... can do to a young persons ears if not used properly.
I would say - save your money maybe if they are responsible get your 9 yr old an ipod shuffle or something in that price range or alternatively - i got my neice an eadventure experience - took ker out on a hot air baloon and we had a blast
alternatively a cheap digital camera is good especially if you take her out for the day to the zoo or even a theme park where she can capture those memories and she will find it educational too.
other presents could be -
hire a limo for the hour for her and her friends and meet them at a restaurant of her choice and pay for them to have a meal
take her ice skating with friends or something where she will have a one off experience to remember - trust me gadgets are son forgotten about
hope this helps